Impacts of the Hole Transport Layer Deposition Process on Buried Interfaces in Perovskite Solar Cells

Shen Wang; Amanda Cabreros; Yangyuchen Yang; Alexander S. Hall; Sophia Valenzuela; Yanqi Luo; Juan-Pablo Correa-Baena; Min-cheol Kim; Øeystein Fjeldberg; David P. Fenning; Ying Shirley Meng

Cell Reports Physical Science (Jul 2020)

Impacts of the Hole Transport Layer Deposition Process on Buried Interfaces in Perovskite Solar Cells

Shen Wang,
Amanda Cabreros,
Yangyuchen Yang,
Alexander S. Hall,
Sophia Valenzuela,
Yanqi Luo,
Juan-Pablo Correa-Baena,
Min-cheol Kim,
Øeystein Fjeldberg,
David P. Fenning,
Ying Shirley Meng

Affiliations

Shen Wang: Department of NanoEngineering, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093, USA
Amanda Cabreros: Department of NanoEngineering, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093, USA
Yangyuchen Yang: Materials Science and Engineering Program, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093, USA
Alexander S. Hall: Materials and Structural Analysis, Thermo Fisher Scientific, Houston, TX 77084, USA
Sophia Valenzuela: Department of NanoEngineering, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093, USA
Yanqi Luo: Department of NanoEngineering, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093, USA
Juan-Pablo Correa-Baena: School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA
Min-cheol Kim: Department of NanoEngineering, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093, USA
Øeystein Fjeldberg: Department of NanoEngineering, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093, USA
David P. Fenning: Department of NanoEngineering, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093, USA; Materials Science and Engineering Program, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093, USA
Ying Shirley Meng: Department of NanoEngineering, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093, USA; Materials Science and Engineering Program, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093, USA; Corresponding author

Journal volume & issue: Vol. 1, no. 7
p. 100103

Abstract

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Summary: Perovskite solar cells (PSCs) are one of the emerging solar cell technologies with high conversion efficiency. Several deposition methods had been applied for preparing their hole transport layer (HTL). However, there are few direct evidences to demonstrate whether HTL and its interfaces in PSCs have been influenced by the deposition methods. In this study, the 3D morphology of PSCs has been reconstructed by focused ion beam-scanning electron microscopy from the PSCs in which HTLs are deposited by different methods. The compositional distribution of HTLs is unveiled as well. All these associated layers and interfaces display obvious morphological and compositional differences that are attributed to the HTL components’ solubility differences in the precursor solvent. Our investigation demonstrates the PSCs that HTL fabricated by dynamic spin-coating method have higher efficiency, better film uniformity, and less interfacial roughness than the static spin-coating-based devices.

Published in Cell Reports Physical Science

ISSN: 2666-3864 (Online)
Publisher: Elsevier
Country of publisher: United States
LCC subjects: Science: Physics
Website: https://www.cell.com/cell-reports-physical-science

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